API : "Pay with Cesium" with a local Cesium install

Why you use the "Pay with Cesium" functionality there is always a link to a specific Cesium server, and it don't seems to be possible to continue this process on a local instance, which is not great for security and privacy.

Copying the url after the domain name should work, but it's clearly not user friendly.

2 ideas :

protocol link as defined in issue #542 which redirect to the local instance (if any/defined)

a QRCode containing all required data is displayed so it can be scanned on a smartphone where the payment process will continue. There could be a "Proceed payment" tab in Cesium asking to scan a "Payment QRCode", then open the same interface as on the web (original) client.